Move all example manifests in us-west-1 to us-east-2

[mbbush]

Description of your changes

The us-west-1 AWS region, like most regions, has three availability zones, but only two are available to new accounts. This means that depending on which AWS account you're running in, some of the example manifests may reference an az code that doesn't exist in your account (I have an account that only allows us-west-1b and us-west-1c, but I think the upbound account used by github actions only allows us-west-1a and us-west-1b).

The simplest way to avoid this is to just avoid the us-west-1 region entirely. This PR replaces all instances of "us-west-1" in the examples directory with "us-east-2". us-east-2 is a region that is available to all accounts by default, which always has three AZs available, which doesn't have some of the "special" behavior associated with us-east-1, and which is only referenced in a few of the example manifests.

I have:

• Read and followed Crossplane's contribution process.
• Run make reviewable to ensure this PR is ready for review.

How has this code been tested

Before this change, I found the following distribution of regions in the example manifests:
us-west-1: 640 files
us-east-1: 201 files
us-east-2: 20 files
us-west-2: 32 files
eu-west-1: 6 files

After this change, the distribution was
us-west-1: 0 files
us-east-1: 201 files
us-east-2: 659 files
us-west-2: 33 files
eu-west-1: 6 files

The counts are off by one from what you'd expect from a straight replacement because I additionally edited the db instance automated backup replication manifest, which had previously used both us-east-2 and us-west-1, to use us-east-2 and us-west-2.

Uptest runs:

✔️ db instance automated backup replication: https://github.com/crossplane-contrib/provider-upjet-aws/actions/runs/8774463999

✔️ KMS replica external key: https://github.com/crossplane-contrib/provider-upjet-aws/actions/runs/8774934667/job/24076679861

My last commit only updated the readme, so most CI was skipped, but it ran successfully on the penultimate commit at https://github.com/crossplane-contrib/provider-upjet-aws/actions/runs/8774918829

[mbbush]

/test-examples="examples/rds/v1beta1/dbinstanceautomatedbackupsreplication.yaml"

[mbbush]

/test-examples="examples/kms/v1beta1/replicaexternalkey.yaml"

[mbbush]

Suggested change

	When creating new manifests in the `examples/` directory, please using the `us-west-1` region, as its inconsistent number
	When creating new manifests in the `examples/` directory, please avoid using the `us-west-1` region, as its inconsistent number

[turkenf]

Thank you for your effort and interest in this PR @mbbush, as far as I can see here, we have changed the region in many of the existing resource examples. My only doubt here is the possibility of uptestable resources failing due to the region change. So it would be great if we could trigger to uptest from commonly used resources before moving this PR forward.

[github-actions]

This provider repo does not have enough maintainers to address every pull request. Since there has been no activity in the last 90 days it is now marked as stale. It will be closed in 14 days if no further activity occurs. Leaving a comment starting with /fresh will mark this issue as not stale.

[github-actions]

This pull request is being closed since there has been no activity for 14 days since marking it as stale. If you're still working on this, feel free to reopen the PR or create a new one!